mfd: ab3100: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20190706164722.18766-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mfd/ab3100-core.c b/drivers/mfd/ab3100-core.c
index e350ab64238e49881919ddce380c7355fd9d47e5..9f3dbc31d3e9fa3346ba12e999d5f6cc9a2c71fb 100644 (file)
--- a/drivers/mfd/ab3100-core.c
+++ b/drivers/mfd/ab3100-core.c
@@ -575,58 +575,27 @@ static const struct file_operations ab3100_get_set_reg_fops = {
        .llseek = noop_llseek,
 };
 
-static struct dentry *ab3100_dir;
-static struct dentry *ab3100_reg_file;
 static struct ab3100_get_set_reg_priv ab3100_get_priv;
-static struct dentry *ab3100_get_reg_file;
 static struct ab3100_get_set_reg_priv ab3100_set_priv;
-static struct dentry *ab3100_set_reg_file;
 
 static void ab3100_setup_debugfs(struct ab3100 *ab3100)
 {
-       int err;
+       struct dentry *ab3100_dir;
 
        ab3100_dir = debugfs_create_dir("ab3100", NULL);
-       if (!ab3100_dir)
-               goto exit_no_debugfs;
 
-       ab3100_reg_file = debugfs_create_file("registers",
-                               S_IRUGO, ab3100_dir, ab3100,
-                               &ab3100_registers_fops);
-       if (!ab3100_reg_file) {
-               err = -ENOMEM;
-               goto exit_destroy_dir;
-       }
+       debugfs_create_file("registers", S_IRUGO, ab3100_dir, ab3100,
+                           &ab3100_registers_fops);
 
        ab3100_get_priv.ab3100 = ab3100;
        ab3100_get_priv.mode = false;
-       ab3100_get_reg_file = debugfs_create_file("get_reg",
-                               S_IWUSR, ab3100_dir, &ab3100_get_priv,
-                               &ab3100_get_set_reg_fops);
-       if (!ab3100_get_reg_file) {
-               err = -ENOMEM;
-               goto exit_destroy_reg;
-       }
+       debugfs_create_file("get_reg", S_IWUSR, ab3100_dir, &ab3100_get_priv,
+                           &ab3100_get_set_reg_fops);
 
        ab3100_set_priv.ab3100 = ab3100;
        ab3100_set_priv.mode = true;
-       ab3100_set_reg_file = debugfs_create_file("set_reg",
-                               S_IWUSR, ab3100_dir, &ab3100_set_priv,
-                               &ab3100_get_set_reg_fops);
-       if (!ab3100_set_reg_file) {
-               err = -ENOMEM;
-               goto exit_destroy_get_reg;
-       }
-       return;
-
- exit_destroy_get_reg:
-       debugfs_remove(ab3100_get_reg_file);
- exit_destroy_reg:
-       debugfs_remove(ab3100_reg_file);
- exit_destroy_dir:
-       debugfs_remove(ab3100_dir);
- exit_no_debugfs:
-       return;
+       debugfs_create_file("set_reg", S_IWUSR, ab3100_dir, &ab3100_set_priv,
+                           &ab3100_get_set_reg_fops);
 }
 #else
 static inline void ab3100_setup_debugfs(struct ab3100 *ab3100)

diff --git a/drivers/mfd/ab3100-otp.c b/drivers/mfd/ab3100-otp.c
index b3f8d359f409a59ab5861a52b030a1d66c8bdae0..c4751fb9bc224b04ff5f3c8a0420d925c1a8249c 100644 (file)
--- a/drivers/mfd/ab3100-otp.c
+++ b/drivers/mfd/ab3100-otp.c
@@ -122,17 +122,11 @@ static const struct file_operations ab3100_otp_operations = {
        .release        = single_release,
 };
 
-static int __init ab3100_otp_init_debugfs(struct device *dev,
-                                         struct ab3100_otp *otp)
+static void __init ab3100_otp_init_debugfs(struct device *dev,
+                                          struct ab3100_otp *otp)
 {
        otp->debugfs = debugfs_create_file("ab3100_otp", S_IFREG | S_IRUGO,
-                                          NULL, otp,
-                                          &ab3100_otp_operations);
-       if (!otp->debugfs) {
-               dev_err(dev, "AB3100 debugfs OTP file registration failed!\n");
-               return -ENOENT;
-       }
-       return 0;
+                                          NULL, otp, &ab3100_otp_operations);
 }
 
 static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
@@ -141,10 +135,9 @@ static void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
 }
 #else
 /* Compile this out if debugfs not selected */
-static inline int __init ab3100_otp_init_debugfs(struct device *dev,
-                                                struct ab3100_otp *otp)
+static inline void __init ab3100_otp_init_debugfs(struct device *dev,
+                                                 struct ab3100_otp *otp)
 {
-       return 0;
 }
 
 static inline void __exit ab3100_otp_exit_debugfs(struct ab3100_otp *otp)
@@ -211,9 +204,7 @@ static int __init ab3100_otp_probe(struct platform_device *pdev)
        }
 
        /* debugfs entries */
-       err = ab3100_otp_init_debugfs(&pdev->dev, otp);
-       if (err)
-               goto err;
+       ab3100_otp_init_debugfs(&pdev->dev, otp);
 
        return 0;